U.S. patent application number 15/360126 was filed with the patent office on 2017-05-25 for actuator and pump using the actuator.
The applicant listed for this patent is Johnson Electric S.A.. Invention is credited to Sheng Li LI, Yong Bin LI, Ping WANG, Chuan Lin ZHAO.
Application Number | 20170149304 15/360126 |
Document ID | / |
Family ID | 58693668 |
Filed Date | 2017-05-25 |
United States Patent
Application |
20170149304 |
Kind Code |
A1 |
LI; Yong Bin ; et
al. |
May 25, 2017 |
Actuator and Pump Using the Actuator
Abstract
A actuator and a pump using the actuator are provided. The
actuator is used to drive a pump body. The actuator includes a
base, a transmission assembly and a motor received in the base. The
motor includes a stator, a rotor, and a driving shaft. The driving
shaft is connected to the transmission assembly. The base includes
a mounting bracket. The mounting bracket is partly embedded in the
motor. The actuator has good integrality and a compact
structure.
Inventors: |
LI; Yong Bin; (Hong Kong,
CN) ; ZHAO; Chuan Lin; (Shenzhen, CN) ; WANG;
Ping; (Shenzhen, CN) ; LI; Sheng Li;
(Shenzhen, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Johnson Electric S.A. |
Murten |
|
CH |
|
|
Family ID: |
58693668 |
Appl. No.: |
15/360126 |
Filed: |
November 23, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H02K 5/1675 20130101;
H02K 5/15 20130101; H02K 7/08 20130101; H02K 7/14 20130101; H02K
5/1735 20130101; H02K 1/2786 20130101; H02K 5/163 20130101; H02K
21/22 20130101; H02K 5/16 20130101; H02K 11/33 20160101; H02K 1/12
20130101; H02K 7/085 20130101; H02K 5/167 20130101; H02K 7/116
20130101; H02K 7/075 20130101 |
International
Class: |
H02K 7/116 20060101
H02K007/116; H02K 11/33 20060101 H02K011/33; H02K 1/12 20060101
H02K001/12; H02K 21/22 20060101 H02K021/22; H02K 7/08 20060101
H02K007/08; H02K 1/27 20060101 H02K001/27 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 23, 2015 |
CN |
2015 1081 8236.0 |
Claims
1. An actuator for driving a pump body, the actuator comprising: a
base comprising a mounting bracket; a transmission assembly; and a
motor comprising a stator, a rotor rotatably relative to the
stator, and a driving shaft fixed to the rotor, the driving shaft
being connected to the transmission assembly, the mounting bracket
being partly embedded in the motor.
2. The actuator of claim 1, wherein the mounting bracket comprises
a connecting board positioned between the motor and the
transmission assembly, and a sleeve extending from a side of the
connecting board along an axial direction of the driving shaft, the
stator is supported on sleeve, the driving shaft rotatably received
in the sleeve, and the rotor is rotatably mounted around the
stator.
3. The actuator of claim 2, wherein the sleeve is integrally formed
with the connecting board.
4. The actuator of claim 2, wherein the base further comprises a
rear cover, the rear cover is disposed at one side of the mounting
bracket away from the stator, the actuator further comprises two
supporting bearings for rotatably supporting the driving shaft, and
the two supporting bearings are fixed to the rear cover and the
mounting bracket close to the connecting board, respectively.
5. The actuator of claim 2, wherein the sleeve forms at least one
guiding member to enable the stator attached thereto with a
predetermined orientation.
6. The actuator of claim 2, wherein the motor is a brushless direct
current motor, the motor further comprises a controller, the
controller is disposed between the mounting bracket and the
stator.
7. The actuator of claim 6, wherein the controller is fixed onto
the connecting board.
8. The actuator of claim 2, wherein the base further comprises a
front cover accommodating the motor, the connecting board and the
front cover are connected through a snap-fit connection.
9. The actuator of claim 1, wherein the mounting bracket defines a
receiving chamber accommodating the transmission assembly.
10. The actuator of claim 9, wherein the transmission assembly
comprises a bearing seat, a transmission bearing, and an eccentric
bushing, the transmission bearing is mounted in the bearing seat,
the bearing seat is received in the receiving chamber, one side of
the bearing seat is connected to the pump body, the eccentric
bushing is fixedly sleeved on the driving shaft and rotatably
mounted in the transmission bearing.
11. The actuator of claim 10, wherein the eccentric bushing is
cylindrical and defines a through hole, an axis of the eccentric
bushing is offset from an axis of the through hole, the driving
shaft passes through the through hole of the eccentric bushing such
that the eccentric bushing rotates along with the driving
shaft.
12. The actuator of claim 1, wherein the stator is an armature, and
the rotor is an excitation assembly with a plurality of permanent
magnets.
13. A pump comprising: a pump body, an actuator for driving the
pump body, the actuator comprising: a base, a transmission assembly
received in the base; and a motor being an outer rotor motor and
comprising a stator directly fixed to the base, a rotor rotatably
mounted around the stator, and a driving shaft connected to the
transmission assembly and fixed to the rotor.
14. The pump of claim 13, wherein the base comprises a mounting
bracket and a front cover detachably assembled to one side of the
mounting bracket, the stator is directly fixed to the mounting
bracket, and the front cover receives the stator and the rotor.
15. The pump of claim 14, wherein a sleeve protrudes from the
mounting bracket, and the stator is fixedly supported on the
sleeve.
16. The pump of claim 14, wherein the driving shaft is rotatably
inserted in the sleeve.
17. The pump of claim 14, wherein the base further comprises a rear
cover, the rear cover is disposed at one side of the mounting
bracket away from the stator, the actuator further comprises two
supporting bearings for rotatably supporting the driving shaft, and
the two supporting bearings are mounted to the rear cover and the
mounting bracket close to the stator, respectively.
18. The pump of claim 14, wherein the driving shaft is connected
with the pump body through an eccentric transmission assembly.
19. The pump of claim 13, wherein the transmission assembly
comprises a bearing seat, a transmission bearing, and an eccentric
bushing, the transmission bearing is mounted in the bearing seat,
one side of the bearing seat is connected to the pump body, the
eccentric bushing is fixedly sleeved on the driving shaft and
rotatably mounted in the transmission bearing.
20. The pump of claim 19, wherein the eccentric bushing is
cylindrical and defines a through hole, an axis of the eccentric
bushing is offset from an axis of the through hole, the driving
shaft passes through the through hole of the eccentric bushing such
that the eccentric bushing rotates along with the driving shaft.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This non-provisional patent application claims priority
under 35 U.S.C. .sctn.119(a) from Patent Application No.
201510818236.0 filed in The People's Republic of China on Nov. 23,
2015.
FIELD OF THE INVENTION
[0002] This invention relates to the field of pumps, and in
particular, to a actuator and a pump using the actuator.
BACKGROUND OF THE INVENTION
[0003] As a kind of driving device, motors are widely used in
various applications. A common application of the motors is using
the motors to drive pumps to achieve the function of pumping water
or evacuation. In a current common mechanism which uses a motor to
drive a pump to perforin the work of pumping water or evacuation, a
conventional complete motor is generally assembled to the pump,
with an output shaft of the motor being connected to the pump to
drive the pump to rotate. Because the motor is an
independently-operable complete motor which includes components of
two bearings, end covers, etc, the whole driving device has a large
size and weight.
SUMMARY OF THE INVENTION
[0004] Accordingly, there is a desire for a compact actuator and a
pump using the actuator.
[0005] In one aspect, a actuator used to drive a pump body is
provided. The actuator includes a base comprising a mounting
bracket, a transmission assembly and a motor received in the base.
The motor includes a stator, a rotor, and a driving shaft fixed to
the rotor. The driving shaft is connected to the transmission
assembly. The base includes a mounting bracket. The mounting
bracket is partly embedded in the motor.
[0006] Preferably, the mounting bracket comprises a connecting
board positioned between the motor and the transmission assembly,
and a sleeve extending from a side of the connecting board along an
axial direction of the driving shaft, the stator is supported on
sleeve, the driving shaft rotatably received in the sleeve, and the
rotor is rotatably mounted around the stator.
[0007] Preferably, the sleeve is integrally formed with the
connecting board.
[0008] Preferably, the base further comprises a rear cover, the
rear cover is disposed at one side of the mounting bracket away
from the stator, the actuator further comprises two supporting
bearings for rotatably supporting the driving shaft, and the two
supporting bearings are fixed to the rear cover and the mounting
bracket close to the connecting board, respectively.
[0009] Preferably, the sleeve forms at least one guiding member to
enable the stator attached thereto with a predetermined
orientation.
[0010] Preferably, the motor is a brushless direct current motor,
the motor further comprises a controller, the controller is
disposed between the mounting bracket and the stator.
[0011] Preferably, the controller is fixed onto the connecting
board.
[0012] Preferably, the base further comprises a front cover
accommodating the motor, the connecting board and the front cover
are connected through a snap-fit connection.
[0013] Preferably, the mounting bracket defines a receiving chamber
accommodating the transmission assembly.
[0014] Preferably, the transmission assembly comprises a bearing
seat, a transmission bearing, and an eccentric bushing, the
transmission bearing is mounted in the bearing seat, the bearing
seat is received in the receiving chamber, one side of the bearing
seat is connected to the pump body, the eccentric bushing is
fixedly sleeved on the driving shaft and rotatably mounted in the
transmission bearing.
[0015] Preferably, the eccentric bushing is cylindrical and defines
a through hole, an axis of the eccentric bushing is offset from an
axis of the through hole, the driving shaft passes through the
through hole of the eccentric bushing such that the eccentric
bushing rotates along with the driving shaft.
[0016] Preferably, the stator is an armature, and the rotor is an
excitation assembly with a plurality of permanent magnets.
[0017] In another aspect, a pump is provided which includes a pump
body, an actuator for driving the pump body, the actuator includes
a base, a transmission assembly received in the base; and a motor,
the motor is an outer rotor motor and includes a stator directly
fixed to the base, a rotor rotatably mounted around the stator, and
a driving shaft connected to the transmission assembly and fixed to
the rotor.
[0018] Preferably, the base comprises a mounting bracket and a
front cover detachably assembled to one side of the mounting
bracket, the stator is directly fixed to the mounting bracket, and
the front cover receives the stator and the rotor.
[0019] Preferably, a sleeve protrudes from the mounting bracket,
and the stator is fixedly supported on the sleeve.
[0020] Preferably, wherein the driving shaft is rotatably inserted
in the sleeve.
[0021] Preferably, wherein the base further comprises a rear cover,
the rear cover is disposed at one side of the mounting bracket away
from the stator, the actuator further comprises two supporting
bearings for rotatably supporting the driving shaft, and the two
supporting bearings are mounted to the rear cover and the mounting
bracket close to the stator, respectively.
[0022] Preferably, the driving shaft is connected with the pump
body through an eccentric transmission assembly.
[0023] Preferably, the transmission assembly comprises a bearing
seat, a transmission bearing, and an eccentric bushing, the
transmission bearing is mounted in the bearing seat, one side of
the bearing seat is connected to the pump body, the eccentric
bushing is fixedly sleeved on the driving shaft and rotatably
mounted in the transmission bearing.
[0024] Preferably, the eccentric bushing is cylindrical and defines
a through hole, an axis of the eccentric bushing is offset from an
axis of the through hole, the driving shaft passes through the
through hole of the eccentric bushing such that the eccentric
bushing rotates along with the driving shaft.
BRIEF DESCRIPTION OF THE DRAWINGS
[0025] FIG. 1 is a perspective view of a pump according to a
preferred embodiment of the present invention.
[0026] FIG. 2 is a perspective, partly exploded view of the pump of
FIG. 1.
[0027] FIG. 3 is a perspective, exploded view of the pump of FIG.
1.
[0028] FIG. 4 is a perspective, exploded view of the pump of FIG.
1, viewed from another aspect.
[0029] FIG. 5 is a perspective view of a transmission assembly of
FIG. 2.
[0030] FIG. 6 is a sectional view of the pump of FIG. 1, taken
along line Iv-IV thereof.
[0031] Below, embodiments of the present invention will be
described in detail with reference to the accompanying
drawings.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0032] The technical solutions of the embodiments of the present
invention will be clearly and completely described as follows with
reference to the accompanying drawings. Apparently, the embodiments
as described below are merely part of, rather than all, embodiments
of the present invention. Based on the embodiments of the present
disclosure, any other embodiment obtained by a person skilled in
the art without paying any creative effort shall fall within the
protection scope of the present invention.
[0033] It is noted that, when a component is described to be
"fixed" to another component, it can be directly fixed to the
another component or there may be an intermediate component. When a
component is described to be "connected" to another component, it
can be directly connected to the another component or there may be
an intermediate component. When a component is described to be
"disposed" on another component, it can be directly disposed on the
another component or there may be an intermediate component.
[0034] Unless otherwise specified, all technical and scientific
terms have the ordinary meaning as understood by people skilled in
the art. The terms used in this disclosure are illustrative rather
than limiting.
[0035] Referring to FIG. 1 and FIG. 2, a pump 100 according to a
preferred embodiment of the present invention includes a pump body
70 and an actuator to driving the pump body 70. The actuator
includes a base 10, a motor 30 mounted to the base 10, a
transmission assembly 50 mounted around the motor 30, and two
supporting bearings 353. The motor 30 includes a driving shaft 351
connecting with the transmission assembly 50.
[0036] In this embodiment, the base 10 is configured for enclosing
the motor 30 and the transmission assembly 50 therein. The pump
body 70 is mounted between the base 10 and the bottom support 80.
The bottom support 80 is used to support the whole pump 100 on a
supporting surface.
[0037] The base 10 includes a mounting bracket 12, a front cover
14, and a rear cover 15. The front cover 14 and the rear cover 15
are mounted at opposite sides of the mounting bracket 12.
[0038] Referring also to FIG. 3, in this embodiment, the mounting
bracket 12 is a plastic member being integrally formed as one
piece, thus shortening the manufacturing process. In other
embodiments, the mounting bracket 12 can also be a welding part or
a spliced part made of a metal or alloy material through welding or
bonding. The mounting bracket 12 includes a connecting board 123, a
base plate 124, and a sleeve 125.
[0039] Referring also to FIG. 4 and FIG. 6, the mounting bracket 12
defining a receiving chamber 121, which is bounded by the
connecting board 123 and the base plate 124. The receiving chamber
121 is configured for accommodating the transmission assembly 50.
The connecting board 123 forms a plurality of catches 1231 and a
plurality of engagement blocks 1232 at one side thereof opposite to
the receiving chamber 121. In this embodiment, the plurality of
catches 1231 and the plurality of engagement blocks 1232 are
separately arranged along a circumferential direction of the
connecting board 123. The connecting board 123 defines a through
hole configured for the driving shaft passing therethough. A
bearing jacket 1233 (shown in FIG. 6) protrudes from one side of
the connecting board 123 away from the plurality of catches 1231
around the through hole of the connecting board 123.
[0040] The base plate 124 is substantially perpendicular to the
connecting board 123. The base plate 124 defines a through hole
1241 with an axial direction perpendicular to the driving shaft
351. The through hole 1241 communicates with the receiving chamber
121. The pump body 70 is configured to be connected to the
transmission assembly 50 via the through hole 1241.
[0041] In this embodiment, the sleeve 125 is substantially
cylindrical. The sleeve 125 protrudes from one side of the
connecting board 123 away from the receiving chamber 121. The
sleeve 125 defining an axial hole communicates with the bearing
hole 1233, to enable the driving shaft 351 to rotatably extend
through the sleeve 125 and the bearing hole 1233. The sleeve 125
forms at least one guiding member 1251 on an outer puerperal
surface thereof. The guiding member 1251 extends along an axial
direction of the sleeve 125. The guiding members 1251 are provided
to facilitate mounting the motor 30 around the sleeve 125 with a
predetermined orientation.
[0042] In this embodiment, the front cover 14 is substantially
hollow cubic member with an opening 140 defined in a side thereof.
The front cover 14 coves the motor 30 and is connected to the
connecting board 123 with the opening 140 facing the connecting
board 123. The front cover 14 forms a plurality of catches 142
adjacent to and around the opening of the front cover 14 to be
cooperatively engages with the engagement block 1232 to fixedly
attach the front cover 14 to the connecting board 123. It should be
understood that the catches 142 can also be formed on the
connecting board 123, and correspondingly the blocks 1232 are
formed on the front cover 14.
[0043] The rear cover 15 is mounted at one side of the mounting
bracket 12 away from the motor 30 to close the receiving chamber
121. The rear cover 15 defines a recess 150 in a side facing the
mounting bracket 12 and a through hole 151 communicating with the
recess, configured for rotatably receiving the driving shaft
351.
[0044] The motor 30 is an outer rotor motor, and includes a stator
31 supporting on the sleeve 125, and a rotor 32 rotatably
surrounding the stator and fixed to the driving shaft 351. In one
embodiment, the motor 30 is a brushless direct current motor, and
further includes a controller 33. In this embodiment, the stator 31
is an armature, which includes a core and windings wound around the
core. The rotor 32 is an excitation assembly, which includes a
plurality of permanent magnets. In should be understood that, in
other embodiments, the stator 31 can also be an excitation
assembly. Correspondingly, the rotor 32 can also be the
armature.
[0045] The stator 31 is mounted around the sleeve 125. An inner
surface of the stator 31 contacting the sleeve 125 forms a
plurality of guiding grooves (not shown) mating with the guiding
members 1251 to enable the stator attached to the sleeve 125 with a
predetermined orientation. The rotor 32 is rotatably mounted around
the stator 31. The rotor 32 rotates about the stator 31 after the
stator 31 is energized. In present invention, the controller 33 is
based on a PCB, which defines a though hole provided for the sleeve
125 passing through. In this embodiment, the controller 33 is
mounted between the connecting board 123 and the stator 31. The
plurality of catches 1231 engages with the controller 33 to fix the
controller 33 at one side of the connecting board 123. The
controller 33 and the stator 31 are connected electrically, thereby
providing electric power to the stator 31 and controlling power
output of the motor 30 by controlling amplitude and direction of an
electric current in the stator 31. The controller 33 includes a
wire 332 for connecting to an external power supply.
[0046] Referring also to FIG. 6, the supporting bearings 353 are
respectively mounted in the recess 150 of the rear cover 15, and
the bearing jacket 1233 of the mounting bracket 12. A gasket 355 is
disposed in the mounting groove 151 and sandwiched between the
corresponding supporting bearing 353 and the rear cover 15. In this
embodiment, the gasket 355 is a corrugated gasket 355, which is
used to adjust a distance between the supporting bearing 353 and
the end surface of the rear cover 15 and reduce vibration between
the supporting bearing 353 and the rear cover 15. One end of the
driving shaft 351 is fixed to the rotor 32, and the other end of
the driving shaft 351 passes sequentially through the sleeve 125,
one of the two supporting bearings 353, the transmission assembly
50, and the other one of the two supporting bearings 353.
Therefore, the driving shaft 351 is rotatably supported by the
sleeve 125 and the two supporting bearing 353.
[0047] The transmission assembly 50 includes a bearing seat 51, a
transmission bearing 53 mounted in the bearing seat 51, and an
eccentric bushing 55 mounted in the transmission bearing 53. In
this embodiment, the bearing seat 51 is generally annular and
hollow, which forms a connector 511 at one side thereof for
connecting with the pump body 70. The transmission bearing 53 is
fixed in the bearing seat 51. The eccentric bushing 55 is fixedly
sleeved on the driving shaft 351 and rotatably mounted in the
transmission bearing.
[0048] In this embodiment, the eccentric bushing 55 is cylindrical
and defines a through hole for the driving shaft 351 passing
therethrough. an axis of the eccentric bushing 55 is offset from an
axis of the through hole 551. In other words, a thicknesses of wall
of the eccentric bushing 55 is ununiform along an peripheral
direction thereof.
[0049] In this embodiment, the pump body 70 is driven by the
actuator for draining liquid. The pump body 70 includes a mating
member 71, a pushing assembly 73, and a sealing ring 75. The mating
member 71 defines a chamber 712 and at least two passages 713a and
713b communicating with the chamber 712. One end of each of the
passages 713a and 713b communicates with the chamber 712, and the
other end of each of the passages 713a and 713b interfacing with a
one-way valve (not shown), thereby forming inlet and outlet
passages of the liquid. The pushing assembly 73 includes an linking
member 731 and a pump head 733 adapted for coving the chamber 712.
One end of the linking member 731 is connected to the connector
511, and the other end of the linking member 731 is connected to a
generally central area of the pump head 733.
[0050] In this embodiment, the pump head 733 is made of an elastic
material, and is generally disc-shaped. An outer diameter of the
pump head 733 is greater than an outer diameter of the chamber 712.
An annular seal 7331 is disposed on the pump head 733 along a
circumferential direction thereof. Opposite sides of the annular
seal 7331 abut against the base plate 124 and the mating member 71,
respectively, such that the chamber 712 forms a sealed environment.
The linking member 731 can force the pump head 733 to be deformed
axially within a certain range, thus establishing a vacuum
environment in an interior of the chamber 712. The sealing ring 75
is disposed on the mating member 71 around the chamber 712, for
further enhancing the sealing effectiveness.
[0051] The bottom support 80 is disposed at one side of the mating
member 71 away from the base plate 124. In this embodiment, the
bottom support 80 is connected to the base plate 124 through a
plurality of screws 81 which extends sequentially through the
bottom support 80 and the mating member 71. For fixing the bottom
support 80 more filially, a backing plate 83 can be arranged
between the bottom support 80 and the screws 81. It should be
understood that the backing plate 83 can also be an anti-loosening
component such as a gasket or a washer.
[0052] In assembly of the pump, an end of the linking member 731
with the pump head 733 mounted thereon is connected to the
connector 511 via the through hole 1241 of the base plate 124. The
screws 81 extend sequentially through the bearing plate 83, the
bottom support 80, and the mating member 71 to assemble the pump
body 70 onto the base plate 124.
[0053] In use. the motor 30 is energized. The driving shaft 351
rotates with the rotor 32. The eccentric bushing 55 rotates in
synchronization with the driving shaft 351. Since the eccentric
bushing 55 has an asymmetric design, the eccentric bushing 55
drives the bearing seat 51 and the pushing assembly 73 connected to
the bearing seat to move along an axial direction of the through
hole 1241 back and forth. In particular, in a period of a rotation
of the eccentric bushing 55 in which a thicker wall side of the
eccentric bushing 55 is moved gradually closer to the base plate
124, the eccentric bushing 55 drives the bearing seat 51 and the
pushing assembly 73 towards the mating member 71. In another period
of the rotation of the eccentric bushing 55 in which a thinner wall
side of the eccentric bushing 55 is moved gradually closer to the
base plate 124, the eccentric bushing 55 drives the bearing seat 51
and the pushing assembly 73 away from the mating member 71. When
the pushing assembly 73 moves away the mating member 71, an air
pressure in the chamber 712 is decreased to generate a suction
force to draw the liquid through one of the one-way valves and the
passages 713a into the chamber 712; When the pushing assembly 73
moves towards the mating member 71, an air pressure in the chamber
712 is increased to drained out the liquid in the chamber through
the other one-way valve and the passage 713b, thus achieving the
drainage of the liquid.
[0054] Although the invention is described with reference to one or
more embodiments, the above description of the embodiments is used
only to enable people skilled in the art to practice or use the
invention. It should be appreciated by those skilled in the art
that various modifications are possible without departing from the
spirit or scope of the present invention. The embodiments
illustrated herein should not be interpreted as limits to the
present invention, and the scope of the invention is to be
determined by reference to the claims that follow.
* * * * *